Search the answers to more than 20,000 questions asked to volunteer scientists or ask a question yourself. This website, run by the US Department of Energy's Office of Science, discusses topics ranging from the uses of cut hair to why algebra is so difficult.
What's going on with the number pi? Why do people age? Why do cells become cancerous? Discover experts’ answers to these questions and more at this website, from the Ernest Orlando Lawrence Berkeley National Laboratory.
Why does chopping an onion make you cry? Why and how do cats purr? Everyday mysteries are unraveled here by the Library of Congress’ science reference librarians.
Have a biology-based question? Howard Hughes Medical Institute scientists might have an answer.